Dashboard is your go-to place to manage and review all the information about your L2.
Top to bottom it consist of:
Here you can add your chain to a wallet and also download the config for Hardhat to deploy smart contracts.
Here is all the necessary info about the RPC, is it public or private, chain id and the RPC url.
here is the link to the UI (and visibility settings) for the LX-to-LY bridge fro Polygon CDK
Each rollup comes with the blockscout instance. How to use a Block Explorer